Research Article

Research on Fatigue Damage of Compressor Blade Steel KMN-I Using Nonlinear Ultrasonic Testing

Figure 10

Microstructure of KMN-I bending fatigue specimen.
(a) Microstructure of point A in Figure 9
(b) Microstructure of point B in Figure 9
(c) Microstructure of point C in Figure 9
(d) Microstructure of point D in Figure 9